length expanded size cdr WAVE problems fmt ratio filename 0:58.38 10320620 B --- -- ---xx flac 0.5016 hisb2016-11-20t01.flac 6:30.44 68899532 B --- -- ---xx flac 0.5393 hisb2016-11-20t02.flac 3:42.65 39313724 B --- -- ---xx flac 0.5307 hisb2016-11-20t03.flac 6:04.17 64249628 B --- -- ---xx flac 0.5500 hisb2016-11-20t04.flac 0:29.52 5237948 B --- -- ---xx flac 0.5210 hisb2016-11-20t05.flac 17:45.66 188021452 B 0.5386 (5 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned